add tcl/board/pico2-debug.cfg; update tcl/board/pico-debug.cfg

pico-debug and pico2-debug are virtual CMSIS-DAP adapters that
run on the otherwise dormant second core of the RP2040 and RP2350
respectively.

Change-Id: Ifd7dcbbabeb86c738cc58854add0e897633197de
Signed-off-by: Peter Lawrence <[email protected]>
Reviewed-on: https://review.openocd.org/c/openocd/+/9099
Reviewed-by: Tomas Vanek <[email protected]>
Tested-by: jenkins

Author: majbthrd

tcl/board/pico-debug.cfg

@@ -6,5 +6,5 @@
 source [find interface/cmsis-dap.cfg]
 adapter speed 4000
 
-set CHIPNAME rp2040
-source [find target/rp2040-core0.cfg]
+set USE_CORE 0
+source [find target/rp2040.cfg]

tcl/board/pico2-debug.cfg

@@ -0,0 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+# pico2-debug is a virtual CMSIS-DAP debug adapter
+# it runs on the very same RP2350 target being debugged without additional hardware
+# https://github.com/majbthrd/pico2-debug
+
+source [find interface/cmsis-dap.cfg]
+adapter speed 4000
+
+set USE_CORE 0
+source [find target/rp2350.cfg]